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地理学报 >

2003 , Vol. 58 >Issue 7s: 38 - 48

DOI: https://doi.org/10.11821/xb20037s005

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内蒙古大(暴)雪的区域特征

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  • 北京大学物理学院大气科学系，北京 100871
江毅 (1982-), 男, 北京大学物理学院大气科学系。Email: yjiang@pku.edu.cn Tel: 010-62764740

收稿日期: 2003-04-07

  修回日期: 2003-05-11

  网络出版日期: 2003-12-25

基金资助

国家基础发展规划项目(No. G1999043405)

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Regional Characteristics of Heavy Snowfall or Snowstorm in Inner Mongolia

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  • Department of Atmospheric Science, College of Physics, Peking University, Beijng 100871, China

Received date: 2003-04-07

  Revised date: 2003-05-11

  Online published: 2003-12-25

Supported by

National Key Project for Basic Sciences, No. G1999043405

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摘要

利用1961年10月~1998年3月期间每年10月至次年3月内蒙古111个测站日降雪量 ≥5 mm的资料，经统计分析和旋转经验正交函数(REOF)分析，阐述了内蒙古大 (暴) 雪 的区域特征。结果表明：(1) 内蒙古大 (暴) 雪的异常发生区与降雪量高值区一致。(2) 降雪异常最突出的区域主要集中在40~45oN，105~123oE范围内。(3) 前冬期(10~11月) 的降雪异常变化对冬季 (10~次年3月) 总降雪异常变化贡献最大，后冬期 (2~3月) 次之，隆冬期 (12~次年1月) 最少。

关键词： 大 (暴) 雪; 冬季; 变率; REOF; 内蒙古

本文引用格式

江毅,钱维宏 . 内蒙古大(暴)雪的区域特征[J]. 地理学报, 2003 , 58(7s) : 38 -48 . DOI: 10.11821/xb20037s005

Abstract

Annual mean monthly snowfall series are analyzed by using daily snowfall (≥5 mm) data of 111 meteorological observations in Inner Mongolia from each year during October 1961 to March 1998. October to the next March is defined as a more objective winter for describing the variation of heavy snowfall or snowstorm in Inner Mongolia. According to such a definition, distributions of heavy snowfall or snowstorm and its varibility in Inner Mongolia are analyzed. Finally spatial patterns of the variation of the snowfall anomaly and their corresponding time variable scales are examined with REOF decomposition. It was found that: (1) the anomalies of the occurrence of heavy snowfall or snowstorm in Inner Mongolia correlate positively to the snowfall itself; (2) the key regions with large variability are located mainly within 40-45oN and 105-123oE; (3) the anomalies of snowfall in winter are mostly attributed to the variation of early winter, secondly to that of late winter and least to that of midwinter; and (4) the heavy snowfall and snowstorm is characterized by a decadal-scale variation.

Key words： heavy snowfall or snowstorm; winter; variability; REOF

参考文献


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